Based on your feedback, we have improved the comparison chart by adding some photos of the rollers. We hope this makes it easier to read. Roller with the least friction is the fastest but certainly there are other important factors to consider too. Read the full report find out more.

We used science to test 15 sets of Mini 4WD rollers:
Kit Standard Roller (13mm/blue) [Item no: 95304]
Kit Standard Roller (14mm/yellow) [Item no: 95130]
Low Friction Roller Set Light Green (16mm) [Item no: 95391]
Low Friction Roller Set Blue (19mm) [Item no: 95391]
13mm Aluminum Ball-race Roller (Ringless/Green) [Item no: 95612]
HG 17mm Aluminum Ball-race Roller (Ringless) [Item no: 15522]
40th Anniversary HG 19mm Aluminum Ball-race Roller (ringless) [Item no: 95643]
HG 13mm Tapered Aluminum Ball-Race Roller (Ringless) [Item no: 95497]
19mm Aluminum Rollers w/Plastic Ring (Dish Type) [Item no: 15426]
19mm Aluminum Ball-race Roller Set J-CUP 2023 (blue) [Item no: 95160]
Lightweight Double Aluminum Roller (9-8mm/Red) [Item no: 95562]
Lightweight Double Aluminum Roller (13-12mm/Green) [Item no: 95606]
9mm Ball Bearing [Item no: 15344]
11mm Ball Bearing [Item no: 15345]
13mm Ball Bearing [Item no: 15475]


![7 different Tamiya Mini 4WD low profile small diameter tyres [Item no: 95208, 95205,95152, 95281, 95304]](https://www.mini4science.com/wp-content/uploads/2024/09/IMG_0538_mod2-150x150.jpg)
![8 different Tamiya Mini 4WD metal rollers [Item no: 95612, 15522, 95643, 95497, 15426, 95160, 15345, 15475]](https://www.mini4science.com/wp-content/uploads/2024/07/IMG_0296-150x150.jpg)






![7 different Tamiya Mini 4WD low profile small diameter tyres [Item no: 95208, 95205,95152, 95281, 95304]](https://www.mini4science.com/wp-content/uploads/2024/09/IMG_0538_mod2.jpg)
![8 different Tamiya Mini 4WD metal rollers [Item no: 95612, 15522, 95643, 95497, 15426, 95160, 15345, 15475]](https://www.mini4science.com/wp-content/uploads/2024/07/IMG_0296-scaled.jpg)

















